I think my one gripe with HTTYD is that one of the biggest draws of the films is the amazing flight scenes and I'm not sure if the coaster can really replicate that. There's still the nitpicky part of my brain that wants "Flights of Passage but Dragons" instead. If the coaster has on-ride audio playing the fantastic film score, it could maybe scratch that itch, though.
That said, the land at least feels like it's scratching every niche that a viking-themed land needs; viking battle boat ride, dragon-riding coaster, thrilling catapult-type attraction, practical effects-filled stage show, and dragon AAs and puppets populating the land. I know some have questioned the use of HTTYD as one of the park's core IPs, but the general concept of vikings and dragons are so timeless that it could honestly be this park's Pandora. Still based on an iconic and beloved film, still a land that will please the fanbase, but also something recognizable and appealing to just about anyone. It'll compliment a spooky European village, a magical 1920s Paris, and the Galilean sci-fi hub quite well.
Wizarding World is probably the biggest wildcard of the park for me. I'm fatigued on Potter for many reasons and think the mix of 1920s Paris and modern day Ministry of Magic sounds kind of nonsensical and forced, but I'm hoping that Universal Creative can find a way to tie things together cohesively. Even I can appreciate Diagon and if they can recapture an iota of that energy, it could be decent. (I think my personal pitch would be to theme the land as a "Wizarding World Fair" that brings in several unique wizarding countries. Paris is the host with its own beautiful theme, the Ministry attraction is framed as the UK's part of the fair where they whisk you away to their country's capital, the stage show could be a performance from some other wizarding country or that French school from the books. It'd feel less like an assortment of Fantastic Beasts leftovers and a cut Diagon expansion and more like an interesting extension of the worldbuilding that Hogsmeade and Diagon began. Just spitballing, though.)